I've never used bluetooth... Does the phone have to handshake with whatever you're sending from? If not you could just broadcast all over hell from some rooftop with an amplified signal and you'd be set If you need to be able to receive from the devices in order to initiate a transfer, how far can those bluetooth devices transmit? A few hundred feet with no obstacles? Is it enough range that you could walk around a baseball game and get a whole section all the way up and down? Like walk it a section at a time, stop and watch the game, move on to the next section, etc I bet that guys living in apartments over traffic jams with sensitive antennas could have alot of fun !! As an aside, why in the HELL would people be trying to program phones to do this? Phones have sh*tty little antennas and transmit something like 200mw or some silly sh*t.... isn't that pretty stupid??